Maintenance
4325−1/A1
RT-flex58T-D
Winterthur Gas & Diesel Ltd.
3/ 4
3. Function check
After completing the assembly carry out a function check, for which the following
precautions have to be taken:
3.1 Initial position
D The stop valves of the starting air receivers must still be closed.
D Screw plug 15 of the shut-off valve has to be removed.
D Shut-off valve for starting air is in position CLOSED (closed by hand).
D Venting valve 2.21 to connection ’VV’ must be closed.
D The engine has to be completely assembled, ready to start and the turn-
ing gear must be in the disengaged position.
D The area of flywheel, propeller shaft and propeller must be free of persons or
objects.
D During the functional check the reversing must remain in position STOP and
START may not be actuated under any circumstances.
3.2 Tightness
⇒ Close venting valve 2.27.
⇒ Open the stop valve of a starting air receiver slowly.
Check whether the automatic shut-off valve is airtight, i.e. verify that no air escapes
from the bore of screw plug 15.
3.3 Manual opening
⇒ Open the shut-off valve slowly with the help of handwheel 16 until locking le-
ver 17 is in the position OPENED (by hand). The discharging air at the bore for
screw plug 15 indicates that valve 4 of the shut-off valve and valve body 10 of
the non-return valve are open.
Risk of accident! Great care must be taken for this operation. To prevent acci-
dents from compressed air suddenly escaping out of the bore for screw plug 15 a
sufficient distance has to be kept.
3.4 Automatic closing
⇒ Turn handwheel 16 to position CLOSED until locking lever 17 engages in
position AUTOMATIC.
D In this position the shut-off valve should, through the spring resistance, be au-
tomatically closed. No more air should come out at the bore for screw plug 15.
D In this position, the valve closes positively only if there is a clearance ’S
1
’ be-
tween spindle 5 and spindle guide 6 (in new condition min. 2 mm − max. 5
mm).
2013
Shut-off Valve for Starting Air: Cleaning and Function Check
CHECK
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